Story of the !Kung San – “!Kung babies have same frequency of crying , but parents reported to calm the cries w/i 30 sec 90% of time (60% of episodes are stopped w/i 5 sec).” – Konner 2005; Barr, Konner 1991

There are several good reasons people thought it might be intestinal – pain-like screams, pass gas, cry after eating, noisy stomach and anti-spasm drugs ↓ crying (but these work because they are also sedating)

Tiny Tummy Troubles – Gas, cramps, constipation

Gas theory is 97%…Hot Air

Stops after 3 months

Delayed in preemies (begins 2 weeks after due date)

X-rays – ↑ gas not at beginning of crying BUT after crying is over!! – Illingsworth, Arch Dis Child, 1954